<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>1.hello world</title>

</head>
<body>

  <!--<script src="1.helloworld.js"></script>-->
   <!--<script src="2.typeScriptInterface.js"></script>-->
  <!--<script src="3.typeScriptClass.js"></script>-->
  <!--<script src="4.function.js"></script>-->
   <script src="5.symbols.js"></script>
</body>
</html>